US5283570A - Multiple format signalling protocol for a selective call receiver - Google Patents

Multiple format signalling protocol for a selective call receiver Download PDF

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Publication number
US5283570A
US5283570A US07/658,451 US65845191A US5283570A US 5283570 A US5283570 A US 5283570A US 65845191 A US65845191 A US 65845191A US 5283570 A US5283570 A US 5283570A
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US
United States
Prior art keywords
selective call
call receiver
information
output
receiver according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US07/658,451
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English (en)
Inventor
Joan S. DeLuca
Michael J. DeLuca
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Motorola Solutions Inc
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Motorola Inc
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Publication date
Application filed by Motorola Inc filed Critical Motorola Inc
Priority to US07/658,451 priority Critical patent/US5283570A/en
Priority to AT92901376T priority patent/ATE222677T1/de
Priority to KR1019930702113A priority patent/KR970009706B1/ko
Priority to CA002098489A priority patent/CA2098489C/en
Priority to PCT/US1991/009103 priority patent/WO1992015178A1/en
Priority to EP92901376A priority patent/EP0572415B1/de
Priority to DE69133090T priority patent/DE69133090T2/de
Application granted granted Critical
Publication of US5283570A publication Critical patent/US5283570A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02Terminal devices
    • H04W88/022Selective call receivers
    • H04W88/025Selective call decoders
    • H04W88/026Selective call decoders using digital address codes
    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00Audible signalling systems; Audible personal calling systems
    • G08B3/10Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
    • G08B3/1008Personal calling arrangements or devices, i.e. paging systems
    • G08B3/1016Personal calling arrangements or devices, i.e. paging systems using wireless transmission
    • G08B3/1025Paging receivers with audible signalling details
    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/22Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
    • G08B5/222Personal calling arrangements or devices, i.e. paging systems
    • G08B5/223Personal calling arrangements or devices, i.e. paging systems using wireless transmission
    • G08B5/224Paging receivers with visible signalling details
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02Terminal devices
    • H04W88/022Selective call receivers
    • H04W88/023Selective call receivers with message or information receiving capability

Definitions

  • This invention relates in general to selective call receivers and more specifically to a selective call receiver signalling format having a single address and accommodating two or more information formats including, for example, BCD, ASCII, pixal, and digital or analog for providing an output mode in numeric, alphanumeric, graphic, and voice, respectively.
  • a message comprises an address if the message is a tone only message, or an address and information if the message is a data message.
  • the information in a data message conventionally comprised one of several output modes (transmitted in information formats) including numeric (transmitted by BCD), alphanumeric (transmitted by ASCII), or voice (transmitted by digital or analog).
  • a preamble of a POCSAG signal comprises a number of zero-to-one transitions for bit synchronization.
  • the first word following the preamble is a sync code word which contains a predetermined binary sequence used for frame synchronization.
  • the structure of the addresses and information may be referred to as the signalling format.
  • the receivers are divided into a plurality of groups and a twenty three bit code in the preamble selects one of the groups in addition to providing means for bit and frame synchronization.
  • a start code indicates that the preamble is finished and the information following contains selective call addresses of selective call receivers within the group and messages for those selective call receivers in a pattern of sixteen information words followed by one start code word.
  • each of the addresses comprised only one information format.
  • Each address would specify to the selective call receiver receiving that address whether its output mode following would be numeric, alphanumeric, or voice.
  • the selective call receiver would thereby encode the proper information format as transmitted, e.g., BCD or ASCII.
  • a selective call receiver comprising a receiver for receiving a signal; the signal comprising an address identifying the selective call receiver, a first information packet having a first information format, a second information packet having a second information format, and a control character; and an output device for presenting the first information packet in a first output mode corresponding to the first information format in response to the control character, and the second information packet in a second output mode corresponding to the second information format.
  • FIG. 1 is a block diagram of a conventional selective call receiver.
  • FIG. 2 is a diagram of the signalling format in accordance with a first embodiment.
  • FIG. 3 is a diagram of the signalling format in accordance with a second embodiment.
  • FIG. 4 is a diagram of the signalling format in accordance with a third embodiment.
  • a transmitter 10 sends signals to an electronic device 11 such as a selective call receiver including a pager comprises an antenna 12 for receiving the signals coupled to a receiver circuit 13 which demodulates the signals received.
  • a memory 15 is coupled to the microprocessor 14 for storing those messages containing the address of the selective call receiver 11 as determined by the microprocessor 14. The portion of the memory 15 in which the address or addresses are stored is generally referred to as the code plug.
  • the microprocessor 14 also controls the storing and recalling of those messages.
  • An alert device 16 provides an alert, i.e., audible, visual or tactile, to the user that a message has been received and is ready to be presented.
  • An output device 17 may be a visual display for presenting the message in a numeric mode, a graphic mode or an alphanumeric mode, for example, and/or a speaker controlled by the microprocessor 14 for presenting the message in an audible mode.
  • the controls 18 allow the user to command the microprocessor 14 to perform the selective call receiver 11 operations well known to those skilled in the art and typically include control switches such as an on/off control button, a function control, etc.
  • control switches such as an on/off control button, a function control, etc.
  • the signalling format in accordance with a first embodiment of the present invention is structured so it can coexist with present selective call protocols such as GSC (Motorola's Golay Sequential Code) or POCSAG (Great Britain's Post Office Code Standardization Advisory Group) on a single or multiple frequency channels.
  • the signalling format comprises a preamble, a code word, an address A 1 , messages M 1A , M 2V and M 3N and control characters CC 1 and CC 2 .
  • the preamble and code word for example, in POCSAG, provides bit and frame synchronization, respectively.
  • the preamble provides both bit and frame synchronization and the code word generally is a start code for the subsequent information.
  • the address A 1 identifies the desired selective call receiver or receivers in a manner well known to those skilled in the art.
  • the address A 1 informs the selective call receiver that the following message M 1A is transmitted in an ASCII information format and will be presented in an alphanumeric output mode.
  • the control character CC 1 informs the selective call receiver that the message M 2V immediately following is transmitted in a digital or analog information format and will be presented in an aural (voice) output mode.
  • the control character CC 2 informs the selective call receiver that the message M 3N immediately following is transmitted in a BCD information format and will be presented in a numeric output mode.
  • the control character CC 3 informs the selective call receiver that the message M 4N immediately following is transmitted in a pixal or a data stream information format corresponding to FAX 1, FAX 2, FAX 3, or FAX 4 protocols, for example, and will be presented in a graphic output mode.
  • a second embodiment of the signalling format comprises an address A 1 , messages M 1A , M 2V and M 3N and control characters CC 1 , CC 2 and CC 3 .
  • the address does not specify a format; however, the control characters CC 1 , CC 2 and CC 3 precede each of the words of messages M 1A , M 2V and M 3N , respectively, thereby informing the selective call receiver in which the following message or messages will be received and presented.
  • control characters CC 1 , CC 2 and CC 3 may each comprise the first three bits of the 21 bit words with the 10 bits for parity immediately following the 21 bit word.
  • the control character CC 1 may comprise the bits "000”
  • the control character CC 2 may comprise the bits "001”
  • the control character CC 2 may comprise the bits "010”. Since the control signal is transmitted with each word, this embodiment provides immunity to control signals being corrupted by noise.
  • Other information formats, i.e., pixel or graphic stream may be transmitted in a similar manner.
  • a third embodiment of the signalling format comprises an address A 1 , messages M 1A , M 2V and M 3N , control characters CC 1 , CC 2 , CC 3 and CC 4 , and message length designators LD 1 , LD 2 , and LD 3 .
  • Each of the message length designators LD 1 , LD 2 , and LD 3 define the length of the respective messages M 1A , M 2V and M 3N .
  • the control character CC 4 indicates that it is the last control character and the messages follow immediately thereafter.
  • Other information formats i.e., graphics pixel or data stream, may be transmitted in a similar manner.
  • each of the messages M 1A , M 2V and M 3N may alternatively comprise several messages in each information format, respectively, and may be interchanged in order.
  • any number of information formats may be transmitted with a single address wherein the information is transmitted in an efficient information format, i.e., a number character may be transmitted using only four bits in a BCD format, an alpha character may be transmitted using only seven bits in an ASCII format, and graphic information may be transmitted in a pixel format or one of the FAX formats. Transmitting each output mode in an optimum information format provides for efficient usage of a paging channel. For example, transmitting a number or an alpha character in a graphic format would require at least 35 pixel bits and transmitting numbers in an ASCII format would require seven bits.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Communication Control (AREA)
US07/658,451 1989-12-14 1991-02-22 Multiple format signalling protocol for a selective call receiver Expired - Lifetime US5283570A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US07/658,451 US5283570A (en) 1989-12-14 1991-02-22 Multiple format signalling protocol for a selective call receiver
AT92901376T ATE222677T1 (de) 1991-02-22 1991-12-10 Mehr-format signalisierungsprotokoll für selektiv rufempfänger
KR1019930702113A KR970009706B1 (ko) 1991-02-22 1991-12-10 선택 호출 수신기용 다종 포맷 신호 전송 프로토콜
CA002098489A CA2098489C (en) 1991-02-22 1991-12-10 Multiple format signalling protocol for a selective call receiver
PCT/US1991/009103 WO1992015178A1 (en) 1991-02-22 1991-12-10 Multiple format signalling protocol for a selective call receiver
EP92901376A EP0572415B1 (de) 1991-02-22 1991-12-10 Mehr-format signalisierungsprotokoll für selektiv rufempfänger
DE69133090T DE69133090T2 (de) 1991-02-22 1991-12-10 Mehr-format signalisierungsprotokoll für selektiv rufempfänger

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US45049489A 1989-12-14 1989-12-14
US07/658,451 US5283570A (en) 1989-12-14 1991-02-22 Multiple format signalling protocol for a selective call receiver

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US45049489A Continuation 1989-12-14 1989-12-14

Publications (1)

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US5283570A true US5283570A (en) 1994-02-01

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Country Status (7)

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US (1) US5283570A (de)
EP (1) EP0572415B1 (de)
KR (1) KR970009706B1 (de)
AT (1) ATE222677T1 (de)
CA (1) CA2098489C (de)
DE (1) DE69133090T2 (de)
WO (1) WO1992015178A1 (de)

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US5794123A (en) * 1994-12-02 1998-08-11 U.S. Philips Corporation Fade recovery in digital message transmission systems
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Cited By (197)

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EP0676732A1 (de) * 1994-04-06 1995-10-11 Firma Erika Köchler Verfahren zum Betrieb eines Personenfunkrufnetzes
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US5649302A (en) * 1994-12-27 1997-07-15 Motorola, Inc. Method and apparatus for identifying an inbound message in a radio communication system
US5974180A (en) * 1996-01-02 1999-10-26 Motorola, Inc. Text compression transmitter and receiver
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EP0572415A4 (en) 1994-06-29
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DE69133090T2 (de) 2003-04-03
DE69133090D1 (de) 2002-09-26
ATE222677T1 (de) 2002-09-15
EP0572415A1 (de) 1993-12-08
CA2098489C (en) 1994-07-26
KR970009706B1 (ko) 1997-06-17
CA2098489A1 (en) 1992-08-23

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